<!DOCTYPE html>
<link rel="author" title="Morten Stenshorne" href="mailto:mstensho@chromium.org">
<style>
  @page {
    size: 300px;
    margin: 0;
  }
  body {
    margin: 0;
    background: green;
  }
</style>
<div>
  Green background, no red / yellow.
</div>
